Tuesday, November 11, 2025

Why Your Letting Agent Software Should Never Slow Down (And How We Make Sure It Doesn't)

Photo of Paul
Paul (Founder)

Paul is a software architect and director at Phillip James Lettings, who have arranged thousands of tenancies over twenty years. LetAdmin is what happens when you know both sides.

Product Development
Developer building automated monitoring that keeps software running fast 24/7

Nothing frustrates a busy letting agent more than slow software. You're trying to respond to a landlord enquiry, but the screen takes five seconds to load. You're updating property details before a viewing, but the save button just spins. You're searching for a certificate during a compliance check, but the search hangs.

Fast software isn't a luxury—it's essential. When you're managing 200+ properties, every second counts. Slow software doesn't just waste time; it breaks your flow, disrupts your focus, and ultimately costs you money.

This week, we built comprehensive performance monitoring into LetAdmin. Not fancy dashboards for developers—practical systems that ensure the software stays fast when you're using it. This article explains why software slows down, how we catch performance problems before they affect you, and what this means for agencies relying on LetAdmin daily.

What This Means for Your Agency

You won't notice anything different—and that's the point. The software should just work, quickly and reliably, every single time you use it.

Behind the scenes, LetAdmin now monitors itself constantly. Every time you load a property page, search for a landlord, or update a certificate, we're measuring how long it takes. If anything takes longer than it should, we know about it instantly—before you ever experience the slowdown.

Here's what we're tracking:

  • Page load times: Every screen in LetAdmin is timed. Properties list taking 2 seconds instead of 0.5 seconds? We get an alert.
  • Search performance: Property search, landlord lookup, certificate filtering—all monitored. Slow searches get flagged immediately.
  • Database queries: The technical stuff that fetches your data. If queries slow down (usually because your portfolio is growing), we catch it early.
  • Image loading: Property photos, certificate documents, inspection images—optimized for fast loading.

Why this matters for letting agents:

When you're on the phone with a landlord and need to pull up their property details, the screen loads in under a second. When you're searching for an expiring gas certificate at 4:55pm on Friday, the results appear instantly. When you're updating inspection notes on-site from your mobile, the save happens immediately.

Fast software isn't glamorous, but it's the foundation of productive agency operations. Every second saved adds up when you're handling hundreds of tasks daily.

How We Catch Performance Problems Early

Think of it like this: we've built a watchdog that never sleeps. Every action in LetAdmin—loading a page, running a search, saving data—gets timed. If something takes longer than expected, we get an immediate email alert with details about what slowed down and why.

Here's the simple version:

  1. We set performance standards: Pages should load in under 500 milliseconds. Database queries should run in under 100 milliseconds.
  2. We measure everything: Every single action gets timed automatically in the background.
  3. We get instant alerts: If something exceeds our standards, we know within seconds.
  4. We fix it before you notice: Most performance issues get caught and resolved during development, long before they reach you.

What this catches:

  • Slow database queries (usually from growing data—more properties, more certificates, more history)
  • Inefficient searches (when filtering isn't optimized properly)
  • Image loading issues (photos taking too long to display)
  • Memory problems (the software using too much of the server's resources)

Real example from this week:

While testing the certificate management system, we noticed property pages with multiple certificates were taking 1.2 seconds to load instead of 0.4 seconds. The monitoring caught it immediately. The issue? We were loading certificate data inefficiently—making multiple database trips instead of fetching everything at once.

We fixed it the same day. You would never have experienced the slowdown because we caught it in testing.

Why Software Slows Down (And How We Prevent It)

Most letting agent software gets slower over time. Here's why:

As your portfolio grows, more properties mean more data to search through. A property search that worked instantly with 50 properties can crawl with 500 properties if the software isn't properly optimized.

As you use more features, complexity increases. Adding certificate tracking, inspection management, and landlord communication can create performance bottlenecks if not carefully managed.

As data accumulates, history builds up. Years of inspection reports, old certificates, archived properties—all this data can drag down performance if not handled correctly.

LetAdmin is designed differently:

  • Database indexing: We optimize how data is stored so searches stay fast regardless of portfolio size.
  • Efficient data loading: We only load what's needed for the current screen—not everything in your database.
  • Image optimization: Property photos are automatically resized and compressed for fast loading.
  • Smart caching: Frequently accessed data is stored temporarily so repeated actions are instant.

The monitoring we built this week ensures these optimizations continue working as LetAdmin evolves.

What This Means for Agencies Using LetAdmin

Fast, reliable software isn't something you should have to think about—it should just work. With this monitoring system in place, we can promise:

Consistent performance as your portfolio grows from 100 to 500+ properties Quick problem resolution when issues do occur (we know about them before you do) Continuous improvement based on real usage patterns, not guesswork

This is the kind of infrastructure work that doesn't make for flashy feature announcements, but it's absolutely essential for software you can depend on daily. If you're managing 200 properties and dealing with dozens of landlords, tenants, and contractors, the last thing you need is software that slows you down.

We'd Love to Hear from You

Are you currently frustrated with slow property management software? We're building LetAdmin specifically for owner-operators and small agencies who need software that keeps pace with their work.

What features would transform your day-to-day operations? We're in active development and would love to hear what matters most to letting agents like you.

Get in touch: paul@letadmin.com


LetAdmin is in active development. We're documenting the build journey publicly to share insights with other agencies and gather feedback from letting agents. If you're interested in seeing what we're building or want to share what your agency needs, we'd love to hear from you.